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AP EAMCET201726 Apr 2017Evening ShiftMathematicsProbabilityActual

A box contains 4 black, 2 white and 6 red balls. Another box contains 3 black and 5 white balls. Throwing an unbiassed die, a ball is drawn from the first box if either 1 or 2 appears on the die-otherwise a ball is drawn from the second box. If the drawn ball is black then the probability that 2 appeared on the die is

Options

  1. A1 13
  2. B2 13
  3. C5 13
  4. D8 13

Correct answer

B. 2 13

Step-by-step solution

No solution. Refer to answer key.

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